The monthly benefit would be given for each child two years old or younger, with a requirement that the money be spent only on diapers.

The benefit would not begin being awarded until 2020, and is expected to cost around $14 million to $18 million annually as part of the CalWORKS welfare program.

Legislative analysis estimates that 26,000 children would currently qualify.

The measure heads to Gov. Jerry Brown for a final verdict.